EP2244145A1 - Procédé pour le finissage d'une pièce et pièce finie - Google Patents

Procédé pour le finissage d'une pièce et pièce finie Download PDF

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Publication number
EP2244145A1
EP2244145A1 EP09158264A EP09158264A EP2244145A1 EP 2244145 A1 EP2244145 A1 EP 2244145A1 EP 09158264 A EP09158264 A EP 09158264A EP 09158264 A EP09158264 A EP 09158264A EP 2244145 A1 EP2244145 A1 EP 2244145A1
Authority
EP
European Patent Office
Prior art keywords
virtual
blank
actual
ist
mass
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP09158264A
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German (de)
English (en)
Inventor
Wilhelm Lange
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Optima Holding AS
Original Assignee
Optima Holding AS
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Optima Holding AS filed Critical Optima Holding AS
Priority to EP09158264A priority Critical patent/EP2244145A1/fr
Publication of EP2244145A1 publication Critical patent/EP2244145A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B19/00—Programme-control systems
    • G05B19/02—Programme-control systems electric
    • G05B19/18—Numerical control [NC], i.e. automatically operating machines, in particular machine tools, e.g. in a manufacturing environment, so as to execute positioning, movement or co-ordinated operations by means of programme data in numerical form
    • G05B19/401—Numerical control [NC], i.e. automatically operating machines, in particular machine tools, e.g. in a manufacturing environment, so as to execute positioning, movement or co-ordinated operations by means of programme data in numerical form characterised by control arrangements for measuring, e.g. calibration and initialisation, measuring workpiece for machining purposes
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B2219/00—Program-control systems
    • G05B2219/30—Nc systems
    • G05B2219/37—Measurements
    • G05B2219/37194—Probe work, calculate shape independent of position, orientation, best fit

Definitions

  • the invention relates to a method for processing a finished part from a blank according to the preamble of claim 1 and a finished part, which has been produced by the method.
  • the invention also relates to a finished part.
  • the material defects may include, for example, sand inclusions, Dross and the like.
  • the planned addition of material makes it possible to remove minor material defects in the course of processing, whereby the rejects can be reduced. For larger material defects, however, this is not possible, so that the functional surfaces do not have the desired quality and the finished part forms rejects.
  • the finished part can theoretically protrude from the blank, which in a mechanical processing to Wall thicknesses or even leads to holes in the finished part.
  • the invention is therefore based on the object to provide a method in which the o. G. Disadvantages are reduced.
  • the blank may include a round material, semi-finished or cast part. From this, the geometry is captured and created a virtual IST body.
  • the virtual IST body spatially displays the actual individual blank in the form of three-dimensional data, in particular three-dimensional CAD data, and is available as an electronic data record.
  • the distance data and position data are also recorded within the machine tool so that the exact positioning of the blank in the machine tool is present in the data set.
  • the target body which is also present as a 3D data record and defines the finished part, is subsequently provided with a virtual addition.
  • This virtual addition is provided in particular in the area of the later functional surface and thereby ensures that it can be produced in a later processing operation with a high surface quality.
  • Both three-dimensional data sets that is the virtual target body and the virtual actual body, are virtually fitted into each other.
  • the virtual target body is virtually moved into the actual body on the basis of the detected distance or position data of the actual body.
  • an adjustment of the reference points, and clamping points takes place.
  • the target body is displaced into the actual body.
  • both methods only achieve the displacement of the target body within a peripheral position of the actual body.
  • an outward but outwardly bounded surface of the ACTUAL body is strictly imposed on the surface of the TARGET body (including the added machining allowances) monotonously decreasing additional mass added.
  • a continuation of the method according to the invention provides that the virtual intersection is calculated from the volumes of actual body and target body (mathematical AND operation) and that the virtual addition is a volume addition.
  • the actual body and the target body are thus varied in their position as long as the intersection volume of both bodies is maximum, that is, that the subsequent finished part including the addition is within the blank.
  • the positional variation of both bodies is based in particular on the calculation of the total differential of both volumes, whereby the partial derivatives according to the three spatial coordinates and the three positional angles form the sensitivity of the volume. In particular, gradient methods are used.
  • the union of the volumes of actual body and target body can also be minimized.
  • the SOLL body is moved into the IST body.
  • both methods only achieve the displacement of the target body within a peripheral position of the actual body.
  • an outwardly strictly monotonically decreasing additional mass is virtually added to the surface of the target body (including the added machining allowances), but limited to the outside by Surface of the actual body.
  • a further variant of the method according to the invention provides that a material defect is detected in the blank and imaged in the virtual actual body.
  • the material defects may in particular be sand trapping or throttling, which are located outside critical zones, such as near the surface, or in highly stressed zones.
  • Sand confinement is understood to mean that sand particles are trapped within the structure or casting surface of the blank during casting, if the blank is a casting.
  • Dross is understood to mean that the blank has non-metallic inclusions of irregular shape, for example, slag skins.
  • the virtual actual body is brought into a position to the target body, in which the material error of the virtual actual body outside the functional area or outside critical zones such as near the surface or in highly stressed areas of the virtual target body is arranged.
  • This ensures that the functional surface of the finished part can have a high surface quality.
  • it can be optimized so that large material defects are arranged outside the functional area or outside of critical zones. Optimization may also mean shifting a fault from a critical zone to a less critical zone. For castings, certain cavities in peripheral areas are often inadmissible, while similar voids in middle layers of the walls of castings are permitted.
  • the relative position of target body to actual body is varied by machine and / or manually. It is particularly advantageous that due to the mechanical variation of the target body and the actual body in the machine tool are automatically fitted into each other. Additional manual variation allows a user to vary the target body and the actual body if, for example, machine variation is not possible. This can be the case if and only if the blank has a plurality of material defects that are so unfavorably distributed that an optimal position of both bodies is not possible and the machine optimization no longer finds a solution. It proves to be advantageous if a CAD interface is provided. This makes it possible, on the one hand, to process the blank, for example in a CNC machine tool, and on the other hand, critical ones Areas are visually displayed. The latter allows a differentiated assessment of the material errors and allows a manual variation of the position of both bodies.
  • the geometry of the blank can be done, for example, by scanning various reference points and the material errors are detected, for example, by ultrasound or X-ray.
  • the scanner is guided by a robot, whereby the IST-body can be scanned in the clamped state, so does not have to be re-clamped after scanning. This increases the accuracy.
  • the object is further achieved with a finished part which is produced from a blank by a method as described above. This ensures that the functional surface of the finished part has a high surface quality and a high degree of geometrical accuracy.
  • an embodiment provides that the blank is a casting. It is of particular advantage in this case that the method according to the invention is applied to a blank in which material defects occur due to the production process, wherein the use of the invention Method a high geometrical accuracy and surface quality of the functional surface is guaranteed.
  • the drawing shows schematically a method 2 for processing a finished part.
  • the finished part is machined from a blank 3, which comprises at least one functional surface to be machined and having a material allowance 5.
  • the method 2 uses a virtual target body 4, which is stored electronically as a 3D data record, in particular as a 3D CAD data record.
  • the SOLL body 4 is a virtual image of the later finished part, which represents the result of processing.
  • the geometry of the blank 3 and its spatial position within a machine tool is detected, for example by a scanner 6.
  • the acquired data is transferred to a data processing system 8 and deposited there as the IST body 10.
  • the data processing system 8 provides a virtual addition 12 to the target body 4.
  • Virtual IST body 10 and virtual SETPOINT body 4 are now virtually fitted together.
  • the target body 4 is virtually shifted into this spatial position on the basis of the detected spatial position of the actual body 10, so that the target body 4 and the actual body 10 lie inside one another.
  • FIGS. 2a to 2c represent schematically these steps.
  • FIG. 2a the geometry of the blank 3 and its position in space is detected.
  • Virtual becomes according to FIG. 2 the blank 3 is subsequently provided with a virtual material allowance 5, wherein the virtual material allowance 5 is a virtual volume addition or mass addition.
  • the IST body 10 is formed.
  • Figure 2c shows that then the SOLL body 4 is inserted into the IST body 10, wherein both body 4, 10 are only partially into each other and form an intersection 14.
  • the virtual intersection 14 is virtually formed.
  • Target body 4 and actual body 10 are varied in their relative position to each other such that the virtual intersection 14 is maximum.
  • intersection 14 can be formed by machine using the data processing system 8. It However, there is also the possibility that a user 16 via the use of a CAD interface 18 IST body 10 and target body 4 varies manually.
  • the actual body 10 may have material defects 20 which are detected during scanning of the blank 3 by means of the scanner 6 and are shown virtually in the actual body 10.
  • the material defects 20 are taken into account by the data processing system 8, so that the actual body 10 is positioned relative to the target body 4 so that the functional surface no or only one has small number of material defects 20 and / or the material defects in the target body only have a smaller and therefore uncritical size.
  • a finished part with a particularly high surface quality in the area of the functional surfaces can be processed.

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  • Engineering & Computer Science (AREA)
  • Human Computer Interaction (AREA)
  • Manufacturing & Machinery (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Automation & Control Theory (AREA)
  • Numerical Control (AREA)
EP09158264A 2009-04-20 2009-04-20 Procédé pour le finissage d'une pièce et pièce finie Withdrawn EP2244145A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP09158264A EP2244145A1 (fr) 2009-04-20 2009-04-20 Procédé pour le finissage d'une pièce et pièce finie

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP09158264A EP2244145A1 (fr) 2009-04-20 2009-04-20 Procédé pour le finissage d'une pièce et pièce finie

Publications (1)

Publication Number Publication Date
EP2244145A1 true EP2244145A1 (fr) 2010-10-27

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ID=40910881

Family Applications (1)

Application Number Title Priority Date Filing Date
EP09158264A Withdrawn EP2244145A1 (fr) 2009-04-20 2009-04-20 Procédé pour le finissage d'une pièce et pièce finie

Country Status (1)

Country Link
EP (1) EP2244145A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2570236A1 (fr) * 2011-09-15 2013-03-20 Ideko, S. Coop Procédé de mesure et d'alignement de pièces pour l'usinage dans une machine-outil
DE202012101957U1 (de) 2012-05-29 2013-09-02 Cadenas Konstruktions-, Softwareentwicklungs- Und Vertriebs Gmbh Datenverarbeitungseinrichtung zur Ermittlung eines passenden Rohteils für die Herstellung eines Fertigteils
EP2669624A2 (fr) 2012-05-29 2013-12-04 Cadenas GmbH Procédé de détermination d'une ébauche adaptée pour la fabrication d'une pièce finie
DE202016106623U1 (de) * 2016-11-28 2018-03-02 Wzt Wendland-Zerspanungs-Technik Gmbh Werkzeugmaschine mit Nennmaßermittlung

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5208763A (en) * 1990-09-14 1993-05-04 New York University Method and apparatus for determining position and orientation of mechanical objects
US5446673A (en) * 1993-03-30 1995-08-29 General Electric Company System and method for finish machining an in-process part having an inaccessible interior cavity
JP2004050300A (ja) * 2002-07-16 2004-02-19 Kawasaki Heavy Ind Ltd 大型ワーク自動仕上げ方法および装置
WO2006024844A2 (fr) * 2004-09-01 2006-03-09 Renishaw Plc Procede de commande d'une machine outil

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5208763A (en) * 1990-09-14 1993-05-04 New York University Method and apparatus for determining position and orientation of mechanical objects
US5446673A (en) * 1993-03-30 1995-08-29 General Electric Company System and method for finish machining an in-process part having an inaccessible interior cavity
JP2004050300A (ja) * 2002-07-16 2004-02-19 Kawasaki Heavy Ind Ltd 大型ワーク自動仕上げ方法および装置
WO2006024844A2 (fr) * 2004-09-01 2006-03-09 Renishaw Plc Procede de commande d'une machine outil

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2570236A1 (fr) * 2011-09-15 2013-03-20 Ideko, S. Coop Procédé de mesure et d'alignement de pièces pour l'usinage dans une machine-outil
DE202012101957U1 (de) 2012-05-29 2013-09-02 Cadenas Konstruktions-, Softwareentwicklungs- Und Vertriebs Gmbh Datenverarbeitungseinrichtung zur Ermittlung eines passenden Rohteils für die Herstellung eines Fertigteils
EP2669624A2 (fr) 2012-05-29 2013-12-04 Cadenas GmbH Procédé de détermination d'une ébauche adaptée pour la fabrication d'une pièce finie
DE102012104605A1 (de) 2012-05-29 2013-12-05 Cadenas Konstruktions-, Softwareentwicklungs- Und Vertriebs Gmbh Verfahren zur Ermittlung eines passenden Rohteils für die Herstellung eines Fertigteils
EP2669624A3 (fr) * 2012-05-29 2014-01-22 Cadenas GmbH Procédé de détermination d'une ébauche adaptée pour la fabrication d'une pièce finie
DE202016106623U1 (de) * 2016-11-28 2018-03-02 Wzt Wendland-Zerspanungs-Technik Gmbh Werkzeugmaschine mit Nennmaßermittlung

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